title: Age-related changes in the feedback regulation of gonadotrophin secretion by sex steroids in men.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D004958:Estradiol / Q000097:blood / Q000494:pharmacology*; D005246:Feedback; D005640:Follicle Stimulating Hormone / Q000097:blood / Q000378:metabolism*; D007987:Gonadotropin-Releasing Hormone / Q000494:pharmacology; D006801:Humans; D007030:Hypothalamo-Hypophyseal System / Q000187:drug effects; D007986:Luteinizing Hormone / Q000097:blood / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D010902:Pituitary Gland / Q000187:drug effects; D013739:Testosterone / Q000097:blood / Q000494:pharmacology*
chemical_list: D007987:Gonadotropin-Releasing Hormone; D013739:Testosterone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone